Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/48cbf328d682
Author: Rudy Lu <left.lu@gmail.com>
Desc: Merge pull request #12021 from luke-chang/913390_adjust_pinyin_padding

Bug 913390 - [Keyboard] Adjust the padding (gray) at the top and bottom ...
r=rudylu

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https://hg.mozilla.org/integration/gaia-central/rev/a13732823f49
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 913390 - [Keyboard] Adjust the padding (gray) at the top and bottom of the candidate panel in the pinyin IME